The release announcement sketch that I have so far is below. Please mail me new items and/or other edits.
Still missing: - Stephen: lazy racket news - Casey: Redex news? - James/Matthew: futures news? (future semaphores, `future' in future, more ...) ---------------------------------------------------------------------- Racket version 5.1.1 is now available from http://racket-lang.org/ * The new `racket/stream' library provides `stream-first', `stream-rest', a lazy `stream-cons', and so on. Streams are a subtype of sequences, so they work in `for' forms. Some sequence generators, such as `in-range', now produce streams. A `racket/sequence' library replaces the old `racket/stream' library. * The new `racket/syntax' library contains facilities useful for writing macros; `syntax/srcloc' and `syntx/location' have been added for manipulating source locations. * The new `ffi/file' library is useful for writing foreign library bindings that cooperate with Racket's security guard mechanism. * The `racket/gui' library now supports multi-column list boxes and scrolling panels. * Generators from the `racket/generator' library can now have formal arguments that are used when the generator is fired up. * Single-precision floating-point number support is now enabled by default; single-precision floats print differently from their default double-precision counterparts, primitives to convert between or distinguish the two have been added, and reader syntax for single-precision specials is now available. * JIT improvements include a small change to aid x86 branch prediction on function-call returns, which can speed up some programs significantly. * Typed Racket: - the numeric tower has been entirely overhauled. TR programs can now use more precise types than before, and check more numeric properties, such as sign or range properties. - fixnum optimizations have been improved and should apply more broadly. - The performance of the typechecker has been improved, in particular, dispatch on large union types should typecheck much faster than before. * The "DrScheme" application (which simply ran DrRacket in the last few releases) has been removed. The "MrEd" GUI executables for Windows and Mac OS X have also been removed, although the "mred" console executable remains for Unix and Mac OS X to support old scripts. * PLaneT development links are now version-specific. * Added `overlay/align', `underlay/align', `overlay/align/offset' and 'underlay/align/offset' to the `2htdp/image' library. * The Universe protocol of 5.1 and its predecessors are incompatible. -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://barzilay.org/ Maze is Life! _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
